1. flux cored wire AWS A5.20 E71T-1 2. ABS, LR, BV, GL, DNV, KR, ... CO2.3. When welding, the gas flow rate is generally 20-25L/min.technical data:PackagingWire SizeSpool SizeNet WeightΦ1.0 ... to protect the flow of gas should be controlled in 20-25L/min. 5.Extend the length of the wire should ... of 15-25mm. 6.Preheating before welding to 150-300 °C, PWHT 700-740 °C tempered by the need to deal with. flux ...